Just purchased my fourth a fifth pairs respectively.
The first pair I left at my ex girlfriend's mate's place after a party and they vanished. They "simply looked everywhere" but "no luck". Nonsense. I know what you did, Michael. These glasses are sick and you took them.
The second pair fell off my head whilst checking for damage underneath my car after hitting a curb and I didn't notice (the glasses weigh nothing) and then I drove over them. Despite being super strong they did not survive a Opel Corsa. Before that they certainly survived most other abuse.
My third pair is currently on my face because they are still in top nick, and I only bought the fourth pair for when I next leave things at some scumbag's house and/or have a car accident.
The fifth pair is black and literally only bought them for one wedding because they're that cool.
In short, buy these.